Hauptklasse des Anmeldefensters enthaltene Informationen
(Muster, Fragen) package ccnu.paint;
import java.awt.Color;
import java.awt.Font;
import java.awt.GridLayout;
import java.awt.Point;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.Enumeration;
import java.util.Properties;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JTextField;
import ccnu.util.Answer;
import ccnu.util.Verification;
public class Login extends JFrame
{
private static final long serialVersionUID = 1L;
private Properties pro = new Properties();
private boolean ver_code = false; // 默认输入验证码错误
private Answer answer = null;
private JPanel p1 = new JPanel(); // 添加到JPanel中的组件默认为流式布局
private JLabel luser = new JLabel("username: ");
private JTextField username = new JTextField(20);
private JPanel p2 = new JPanel();
private JLabel lpwd = new JLabel("password: ");
private JPasswordField pwd = new JPasswordField(20);
private JPanel p4 = new JPanel();
private JLabel lVer = new JLabel("verification: ");
private JTextField ver = new JTextField(10);
private JLabel img = new JLabel();
private JLabel result = new JLabel();
private JPanel p3 = new JPanel();
private JButton ok = new JButton("ok");
private JButton cancel = new JButton("cancel");
private JButton signUp = new JButton("Sign up"); // 用于账户注册
// 设置组件的监听
public void initListener()
{
username.addActionListener(new ActionListener()
{
@Override
public void actionPerformed(ActionEvent e)
{// JTextField的action是回车键
String name = username.getText();
// Login.this.setTitle(name);
// System.out.println(name.hashCode() + "***" +"".hashCode());
if (name.equals(""))
{
JOptionPane.showMessageDialog(Login.this, "Please input a userName!");
} else
{
pwd.grabFocus();
}
}
});
pwd.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent e)
{
String password = new String(pwd.getPassword());
if(password.equalsIgnoreCase(""))
{
JOptionPane.showMessageDialog(Login.this, "please input a password!");
}else{
ver.grabFocus();
}
}
});
ok.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent e)
{
// 重新加载最新的账户文件
try
{
pro.load(new FileInputStream(new File("src/res/accouts.properties")));
} catch (IOException e1)
{
e1.printStackTrace();
}
check();
}
});
// 判断验证码是否正确
ver.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent e)
{
String verCode = ver.getText();
if(verCode.equals(""))
{
JOptionPane.showMessageDialog(Login.this, "Please input a verification!");
}else{
if(verCode.equals(answer.getResult()))
{
result.setIcon(new ImageIcon(Login.this.getClass().getResource("/res/right.jpg"))); // 显示提示的图片信息(如√图片)
ver_code = true;
// 检查之前，重新加载最新的账户文件
try
{
pro.load(new FileInputStream(new File("src/res/accouts.properties"))); // 将账户文件加载进来
} catch (IOException e1)
{
e1.printStackTrace();
}
check();
}else{
result.setIcon(new ImageIcon(Login.this.getClass().getResource("/res/error.jpg"))); // 显示提示的图片信息(如×图片)
ver_code = false;
}
}
}
});
// 点击图片会更改验证码
img.addMouseListener(new MouseAdapter(){
@Override
public void mouseClicked(MouseEvent e)
{
answer = Verification.verification();
img.setIcon(new ImageIcon(answer.getBufferedImage())); // 设置验证码图案
}
});
cancel.addActionListener(new ActionListener()
{
@Override
public void actionPerformed(ActionEvent e)
{
int option = JOptionPane.showConfirmDialog(Login.this, "Are you sure to exit?");
// System.out.println("option = " + option);
if (option == 0)
{// Yes
Login.this.dispose();
}
}
});
signUp.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent e)
{
new SignUp();
}
});
}
// 初始化登录窗口及其组件的设置监听
public Login()
{
super("Login");
// 加载账户文件
try
{
pro.load(new FileInputStream(new File("src/res/accouts.properties"))); // 从指定位置将账户文件加载进来
} catch (IOException e)
{
e.printStackTrace();
}
initListener();
answer = Verification.verification(); // 生成验证码
img.setIcon(new ImageIcon(answer.getBufferedImage())); // 设置初始验证码
this.setLocation(new Point(200, 200));
this.setSize(500, 300);
this.setLayout(new GridLayout(4, 1, 0, 20)); // 垂直间隙为20px
p1.add(luser);
p1.add(username);
p2.add(lpwd);
p2.add(pwd);
p4.add(this.lVer);
p4.add(this.ver);
p4.add(this.img);
result.setForeground(Color.red);
result.setFont(new Font("楷体", Font.BOLD, 20));
p4.add(result);
p3.add(ok);
p3.add(cancel);
p3.add(signUp);
this.add(p1);
this.add(p2);
this.add(p4);
this.add(p3);
// this.setBackground(Color.blue); // JFrame的上层还有一个ContentPane
this.getContentPane().setBackground(Color.gray);
this.setResizable(false);
this.setVisible(true);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); // 等价于Frame中的windowClosing事件
}
// 检查用户名或密码
public void check()
{
String verCode = ver.getText();
if(verCode.equals(""))
{
JOptionPane.showMessageDialog(Login.this, "Please input a verification!");
return;
}else{
if(verCode.equals(answer.getResult()))
{
result.setIcon(new ImageIcon(Login.this.getClass().getResource("/res/right.jpg")));
ver_code = true;
}else{
result.setIcon(new ImageIcon(Login.this.getClass().getResource("/res/error.jpg")));
ver_code = false;
}
}
if(ver_code == false)
{
JOptionPane.showMessageDialog(this, "verification is error!");
return;
}
String name = username.getText();
String password = new String(pwd.getPassword()); // return char[]
// if (name.equalsIgnoreCase("admin") && password.equals("123456"))
if (isPass(name, password))
{
// new PaintApp(name);
JOptionPane.showMessageDialog(this, "-^_^- OK..."); // 此处可以加上其他的登陆成功后进一步处理的窗口
this.dispose();
} else
{
JOptionPane.showMessageDialog(this, "userName or password is incorrect!");
username.setText("");
pwd.setText("");
ver.setText("");
answer = Verification.verification();
img.setIcon(new ImageIcon(answer.getBufferedImage()));
result.setIcon(null);
}
}
// 验证用户输入的账户名和密码是否正确(通过与加载进来的账户 pro 比对)
public boolean isPass(String name, String password)
{
Enumeration en = pro.propertyNames();
while(en.hasMoreElements())
{
String curName = (String)en.nextElement();
// System.out.println(curName + "---" + pro.getProperty(curName));
if(curName.equalsIgnoreCase(name))
{
if(password.equalsIgnoreCase(pro.getProperty(curName)))
{
return true;
}
}
}
return false;
}
public static void main(String[] args)
{
new Login();
}
}
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Anmeldeeffekt
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